Stitch-impression machine.



F. F. DORSBY.

STITCH IMPRESSION MACHINE'.

APPLICATION FILED APR. 24, 1909,

1,047,924. y Patented Dec.24, 1912.

- wlTNEssEs: 1N VEN-TOR.I

UNTEDSTAES PATENT oEEioE.r g f? 'l EAENUM E. DoEsEY, OEy NEW YORK, N. Y., AssIGNoR To UNITED SHOE MACHINERY COMPANY, OE PATEESON, NEW JERSEY, kA CORPORATION OE NEW JEESEY.

STITCH-IMPRESSION MACHINE. Y

To all whom' it may concern: Be it known that IFARNUM F. DoRsEY, a citizen of the United States, residing at New York, in thercounty of New York and State of New York, have invented certain rnew and useful Improvements in Stitch- Impression Machines, of which the following is a specification.` i

AThis invention relates to machines for produc-ing ornamental indentations or impresrsions upon the Welt, or upon the upper surface of the sole-margin, of a shoe, tojproduce an ornamental effect, or to simulate the appearance of a seam,`

Y The object of the invention is to produce 'a machine which will operate rapidly,` and' which will produce regular and sharply- I defined impressions regardless of the shape n producel a` machine which is adapted fo-r usev of the shoe.

VA second object of the invention is t-o Awhich has the kgeneral kcharacter of a roll andwhich operates rotatively, ibut kwhich comprises a plurality of members ,which are p V,relatively-movable in the direction ofthe aXis of the tool or of the length of the im- 'pression-forming teethv of the'tool, both for the purpose O-f accomodating the tool to the form of the shoe, and for thepurpose of securing the ,burnishing effect. y

In stitch-impression machines, asprevi'- ously constructed, where a tool inthe fo-rm ofy a roller is used, it has beennecessary and customary to form the roller as a truncated cone with its larger end outward,`in order to produce an acute angle at the portion Vof the roller which yenters the crease between the upper of the shoe andthe welt or the sole-margin. In a rollerof this form the indenting teeth, are necessarily convergent toward the inner and smaller end of the roller, but thisarrangement is Vobviously incorrect, so far as` the proper relation of the form of the teeth' to the form of the work is concerned, since the' outline of the shoe at the fore-part is so'curved that the im- "pressions must converge toward the center v Specification of Letters Patentlj Patented Dec. 24, 191.2.

i f Application-filed April 24, 1909. Serial No. 492,058.k i i of curvature, within the margin of the sole, that is, from the edge inward, which' is Oppositeto the direction of convergence of the i teeth of the tool. This incorrect relation renders 'it difficultto produce regular and clearly-defined impressions, particularly about the toe `of the shoe, where the curvature is sharpest, and it also-makes it impracticable to feed thework by the'action ofthe tool. Owing to the' defects above pointed outin machines of thertype referred to, it has been proposed to usemachines operating yintermittently:and Without the use of rollers, but such machines are( comparatively slowin operation and'do not feed the work uniformly and'smoothly. i f

In Zmy present invention I secure the smooth and rapid operation of a roller 'machine, While avoiding the imperfect'work dueL to the use of the usual conical roller, This result I accomplish vby the use of a plurality of members, each of which is provided with one or more impression-forming I teeth. These members are circularly disfposed'so as to constitute a compound tool having theggeneral `fo-rm of a roller, and they have a general movement of rotation so as to feed the .work and to be brought successivelyintoengagement with thework.

lIn addition to their rotation, thevtool members are moved independently in the general direction of theaXis vof the tool, or subbers forward as they engage the work, to

cause them to enter fullv'between' the shoeupper and the welt ork the sole-margin, and

ythen to retract them so as to clear the overhanging upper as they are raised from the j work in their continued rotation. The secondary purposefof the axial movement of the tool members is to causegthem to move f longitudinally whilejengaging the work, so as to burnish the stitch impressions.

. Other objects and features of my invention kwill be notedin connectionr with the following description of the illustrated embodiment of the invention.

In'the accompanying drawingsFigure 1' is aivertical 4longitudinal Ysection of*l a r`Ina-k chineembodying the present invention, and 1 Fig. 2 `is a frontelevation of the machinerr illustrated in Fig. 1, with the upper part of the machine broken away on the line m in Fig. 1.

In the illustrated embodiment of the invention the several members, 16 in number, of which the tool is composed, consist of bars 1 which are tapered in cross-section toward their inner edges, so that they lie close together in a body having the general form of a hollow cylinder. Each tool member l has two teeth 2 form-ed in its outer edge near the forward end, and the toothed extremities of the members constitute, together, a continuous toothed surface substantially like that of a. cylindrical toothed roller. The forward extremities of the tool members are also beveled, as shown in Fig. 1, so that they may enter the crease between the shoe-upper and the weltor sole-margin.

The tool members 1 are mounted in a tool-carrier which comprises a stem 6 and cylindrical sleeve 3 surrounding the stem. The sleeve 3 is journaled in a bearing 8 in the frame or casing 9 of the machine. The outer edges of the toothed members are formed with longitudinal ribs 1, which engage corresponding grooves in the sleeve 3, and thus the tool members are free to slide longitudinally in the annular space between the stem 6 and Sleeve 3, but are restrained from rotation therein.

ln order to guide and support the inner edges of the tool members, these edges are beveled, as at 5 in Fig. 1, and they engage corresponding angular grooves in the central stem 6 which is connected rigidly at its rear end to the sleeve 3, as shown in Fig. 1, so as to rotate in unison with the sleeve. For this purpose the stem is xed in a block 7 fitting the sleeve and the stem, the block and the sleeve are all secured together by a transverse pin.

In the machine illustrated I feed the work by positively rotating the tool. For this purpose a gear 10 is iixed on the tool carrier, and this gear meshes with a pinion 11 which is fixed on a drive-shaft 12. The driveshaft is provided with a pulley 13, which may be connected with any suitable source of power to actuate the machine.

The work is supported, during the operation of the tool, by a rotatable work support 14, of well-known form. which is carried by a vertical slide 15. `The slide moves iu guides 1G in the frame of the machine, and it is connected, by a rod 17, with a treadle (not shown) of any ordinary or suitable form, by which the work support may be raised to bripg the work into engagement with the too The longitudinal or axial movements of the tool members are produced through the action of bell-crank levers 18. These levers are pivoted on pins 19 fixed in forked arms 20, and the arms are mounted upon the back of the gear 10, so that as the gear rotates the levers are carried around with it. Each lever 18 carries a cam-roll 21, and the camrolls travel in ay cam-path formed in the forward fa-ce of a plate-cam 22. This cam is fixedin the casing or frame of the machine, being provided with a hub 24 seated in a boss in the frame and secured against rotation by a pin 26. The hub 24 is bored to form a bearing for the rear end of the sleeve 3 of the tool-carrier, which rotates freely therein.

Each lever 18 has an arm extending into the tool-carrier through a slot 23 in the sleeve 3 and engaging a notch in one of the tool-members, as shown in Fig. 1, so that each tool-member is independently actuated by one of the cam-levers, and as the levers follow each other in the cam-path they are actuated in succession to move the tool members forward and back.

The form of the cam-path is indicated in dotted lines in Fig. 2, and 1t will be seen that in its upper portion it is concentric with the axis of the tool-carrier and at its maximum distance from the center, so that the tool members, when at a distance from the surface of the work, remain in retracted position so as to clear the overhanging upper of the shoe. As the tool-members and the corresponding cam-rolls approachthe lowermost point in their path of motion, however, the cam-rolls engage a portion 2T ot' the cam-path where it curves inwardly, and this results in a. motion of the cam-levers by which the tool-members are thrust into their forward position. This action is timed to occur as the tool-members pass below the projecting shoe-upper, and it is preferably completed before the tool-members engage the work, so as to avoid movementof the tool-members when under pressure in an inclined position, and to reduce wear on the cam-rolls and the cam.

As the tool-members retreat from the work they are retracted in a similar manner, the cam being formed symmetrically in this respect, so that the machine may be rotated and caused to feed the work in either direction, according to the convenience of the operator.

The machine, in so far as above described, is adapted to form stitch-impressions or indentations in the iirst instance, and it operates uniformly and continuously, and may be driven as fast as the operator can guide the work. The pressure of the tool against the work is controlled by the operator, by the operation of the treadle on the work-support, and as the tool tends normally to form parallel impressions, the work may be done on both rentrant and salient. curves with a minimum of inaccuracy and without the uncertainty of a. conical roll such as is ordinarily used. H

work.

f Tof adapt the machine to burnish. stitch` impressions, the cam 22 is formed to impart `an additional motionto the tool-members.

kAs shown in Fig.i2,a shortdepressionQQ is formed at ther lowermostpoint in the cam path, and this results in a short retractmg andf'advancing movement in each tool-mein-v ber while it is in full engagement lwith the This'movement can-uses the tool-meinber to slide in the stitch impression and kthereby to smooth or burnish the surface of the impression and of thematerial between the impressions.

The ,machine may be used to form and burnish the impressions at one operation, or it may be usedto burnish impressions previously formed either by the same ,machine or by-a machine of a different kind, and thus a single machine is suflicient to perform the operations for which usually required. y

"In order to support the tool-members without undue friction during their burnishingmovement-s, which occur while the tooltwo `machines are members'are under pressure from the work,

a ball 30 is located .between the forward por tions of the tool-members, engaging flattened portions of their inner edges. ball has a rolling engagement with each toolmember as it is retractedfand advanced by the act-ion of the portion 29 of the cam, the

ltool members being fitted sufficiently loosely in the tool-carrier to permit the pressure to ybe borne by the ball and ynot by the edges of the tool members in engagement with the stem 6. n

Although I consider it preferable, and

sufficient, to feed the Work by the rotation of `the tool, it will be apparent that the workfollowing claims.

1; A' stitch-impression machine having, in y combination, a pluralit-y of tool ymembers arranged to engage they work successively and to operate continuously thereon, and means for advancing'the tool members as they approach the surface of the Work, for imparts ing to the tool members a backward and for- Ward burnishing ymovement while they are in engagement with the work and for re tracting the tool ymembers as they recede g Gio fromthe surface ofthe work.

-V l2. A stitch-impression machine having, in

combination, a rotatively-mounted tool comprising a plurality of work engaging members arranged rina circle, meansfor imparting to the work engaging members advanc ing and retractingmovements substantially in the direction of the axis yofthe tool as the This work engaging members .approach andre` f cede from the surface of the Work, and

means for` imparting kto each `work engaging member a short retracting and radvancing movement While it is in Contact with the Work to burnish the impression.r

3. A stitcheimpression machineA having in combination,a rotary carrier having axially extending guidevvays, a pluralitylof tool members .longitudinally 1 movable 4vin said guidevvays, leversmounted o-n the carrier f and engaging said tool members, and a cam for oscillating the levers toniove the tool members in thecarrier. n

`t. A stitch-impression machine having, in combination, a rotary carrier having axially .extending guideways, a plurality of tooll members longitudinally movable in ysaid guidevvays, bell crank levers mounted on the carrier and articulated with the tool members, means for rotating the carrier, and a stationary barrel cam engaged `by the free` ends of the bell crank levers and acting to oscillate them to move the tool members rela- Y.

tivelyto the carrier. p f 5. A stitch-impression machine having, in

combination, ka rotarytool carrier comprising a cylindrical sleeve, a'pluralityk of tool members inclosed by and slidingly mounted inthe sleeve, means fory rotating the car" rier, andmeans for independently moving the tool members longitudinally of kthe sleeve. Y Y v Y 6. A stitch-impression machine having, in combination, a rotary ytool carrier compris ing a stem and a cylindrical sleeve surrounding the stem, a plurality of too-l members held to move longitudinally in the annular space bet-Ween the stem and sleeve, means for rotating the tool carrier, and means for reciprocating the tool members in the carrier.y 7. A stitch-impression machine having, in

combination, a rotary tool carrier compris ing a stem fo-rmed with longitudinal grooves and a cylindrical sleeve surrounding the iiofl stemand formed with grooves on its inner Vsurface opposite the 'grooves on the stem,y

toolmembers mounted in the carrier with their edges slidingly received in said grooves,

meansv for rotating the carrier, and meansk in the for reciprocating the tool members carrier.

8. A stitchimpression.machine having, in y combination, a rotary tool carrier compris-k inga stem anda cylindrical sleeve surround-v ing the stem, aplurality of ltool bars held to slidelongitudinally in the annular space between the stem and sleeve, levers mounted onthe carrier and extending within the periphery ofthe sleeve to engage thetool bars,

means for rotating the tool carrier, andL means for oscillating the leversto reciprocate the tool bars in the'carrier. y n

V9. Astitch-impression machine having, in combination, a rotaryktool carrier, a plu-V rality of tool bars grouped in a general-cylindrical arrangement in the carrier, a ball surrounded by the bars and acting as an anti-friction bearing between their inner edges, means for rotating the carrier and bars, and means for reciprocating the bars in the carrier.

l0. A stitch-impression machine having, in combination, a rotary carrier comprising a stem formed with longitudinal grooves, a plurality of tool bars sldingly heldin said grooves and projecting forwardly beyond the end of the stem, a ball of approximately the same diameter as the stern held between the projecting ends of the bars and acting FARNUM F. DORSEY.

Titnesses GRACE CARss, MINNIE M. DENNEBAUM.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

